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April 27, 192e. v1,582,816

J, l.. HEMP srovEPIPE THIMBLE Filed May 11, 1925 Patented Apr. Z7, 1926.

unir so sgr er Es4 Per sur JOSEPH L; HEME, or sfr. Louis, M1sso-UnLfAssIeNQBL1To@nuria-.companycontienne Tron, or; sr; Louis-, ivrissonm,A A; CQREQRAMON: QF" M-ISQURI..

STOVEPJEE THE'IMBLE.

Application fued may, 11, 1925. serial no. 29,352.

and which is so constructed that its insertion.

in a flue opening is limite-d and the inserf tion oa pipe within the .thimble is also limited so that there will be no possibility of pushing the pipe through lthe thimble and into the flue and thus affect the draft of the stove.

A further object is to construct a stove pipe thimble of two separate pieces of sheet metal and secure them together without the use of rivets or similar fastening means and which the inner member is sov arranged that in the event the stove pipe is slightly smaller than the interior diameter of the outer member a tight joint can be made between the pipe and inner member, and thus prevent the leakage of gases into the room.

In the drawings Fig. l is a front view of my device;

F 2 is a side elevation of the same; and

Fig. 3 is an enlarged section taken on the line of Fig. l.

In the construction of my device, I employ an outer member 4. which is provided at one edge with a bead 5 and at the other with an inturned portion 6. Adjacent the inturned portion 6 is an inclined portion 7, which is for the purpose of permitting the ready insertion of the thimble in the flue hole. Adjacent the inclined portion 7 is an inwardly projecting bead 8. rIhe member d is cylindrical from the bead 5 to the bead 8 and is formed of sheet metal with overlapping edges which are secured together by means of rivets 9. Within the member fl is inserted a member which has its forward portion 10 tapered and preferably corrugated as in Figs. l and 3. The interior member is also provided with an inwardly eX- tending bead Il, which fits over the bead 8 and in this manner the two members are secured together and prevented from coming apart. The portion 12 of the interior member is inclined so as tofit snugly against the inclined portion 71while the edgefl-is in close proximity to the; inturned edge 6:' ivhenthe two members are assembled, there will be a` tapering space ltbetween the portion l() of the interior member and the cy-l lindrical part o f the member L hand in this space the endofthe. stovepipe passes, the interior member, however, preventing` the pipe. from passing entirely throughl the thimble, nov matter whatV force is used?, and should-the pjiperlbe'slightly less in diameter than thediameter ofthe member, itnwill engage with Vsome portion ofthe outer surface of the forward endl() of the interiorinember, and thus make altight joint andprevent-` any leakage of gases into the room. The groove or bead 8 also acts as a mortar groove, which becomes filled with mortar or cement when the thimble is installed and prevents its ready removal from the flue opening.

My device is preferably assembled as follows I :first take a strip of sheet metal of the desired width and length and place it between forming rollers, which gives it a cylindrical form. At the same time that the strip is being formed into a cylinder, the edge 6 is turned inwardly. 'Ihe two ends of the member 4; are then riveted together. The interior member is then formed and secured by means of a rivet 15, the forward end being corrugated so as to give it a taper while the part adjacent the taper remains cylind ical The two members having been now formed, the interior member is inserted within the cylindrical member 5l. until the edge 13 contacts with the inturned portion 6. The device is then placed in a beading machine and the bead 5, the grooves or ribs 8 and 1l, and the tapered portions 7 and l2 formed simultaneously. In this way the two members are held securely together and against any possibility of coming apart, and the device is ready for shipping or installation, and, as previously stated, the bead 5 at the forward edge limits the insertion of the thimble in the flue opening so that there is no possibility at any time of the thimble being jammed back into the flue.

Having fully described my invention, what I claim is l. A stove pipe thimble comprising an outer member provided on one edge with an outwardly extending bead and on the end opposite said bead with a smooth tapered terminal portion the edge of the tapered portion being abruptly bent inwardly, an inner member having one end tapered and corrugated and its opposite end having a smooth tapered terminal portion abutting the inwardly bent portion, and an internally projecting bead formed in and completely around both members adjacent their terminal tapered portions for interlocking said members together and answering as a mortar groove.

2. A stove pipe thimble comprising an outer member provided on one edge with an outwardly extending bead and at the end opposite said bead with a smooth tapered terminal portion provided with an inturned edge, an inner member having one end corrugated and tapered and its opposite end having a smooth tapered terminal portion, and an internally projecting bead formed in and completely around both members adjacent their terminal tapered portions 'for interlocking said members together and answering as a mortar groove.

3. A stove pipe thimble comprising any outer member provided on one edge with an outwardly extending bead and at it-s opposite end with a smooth inwardly tapered terminal portion having an inturned edge, an inner member having a corrugated tapered end lying completely within and spaced apart from the outer member and having its opposite end provided with a smooth inwardly tapered portion, an internally projecting bead extending around both members adjacent the smooth terminal tapered portions ot both members for interlocking the same together and providing a mortar groove, a rivet located in the outer member and in the inner member for securing the ends thereof, said rivets being positioned well in front of the bead so as to leave the outer margins of both members practically unattached whereby they may be freely tapered.

In testimony whereof I have atlXed my signature.

JOSEPH L. HEMI?. 

